Hey all,
I have this USB externel hard drive 2.5" of 30GB.. I have been using it to backup all my images, instead of placing them in my Laptop.. I am not a very techincal person when it comes to Computers, but when ever i connect this hard drive to my Laptop it makes wierd noises and the Computer can not detect it at all.. I am using Windows Vista and it used to work absolutely fine.. It started to happen in the last two weeks..

If.. Your reply is that my Hard drive is Dead! Is there any possible way that i can recover the data from that hard drive?? I already have bought another 2.5" 60GB from Ebay.

Weird sounds could be OK.
It's hard to understand how exactly it sounds in your case. Is it something similar to any of these sounds: http://datacent.com/hard_drive_sounds.php ?
If yes then it's a mechanical problem and you will need a help by a professional.
If it sounds OK - try to remove it from enclosure and connect directly to your computer via adapter.

Based off of what you said, it is more than likely a physical problem that will not be resolved by switching from computer to computer. I would take a look at ellis's link which could be helpful in diagnosing the problem. A classic sound is spinning up, clicking and trying to spin up, and clicking again, and so on. Or the constant clicking is also bad.

Although, there is one more possibility that comes to mind. Mind showing us the hard drive? If it gets power from USB strictly, and you have another device sapping power from the USB ports you can have issues. A lot of small hard drives operate at about 5V @ 500 to 1000ma. USB provides 5V@500ma, which is sufficient for the former, unless a power hungry device is also attached. So, it's possible for the hard drive to have a hard time spinning up, and instead constantly clicking due to insufficient power.

You probably dropped it sometime or someone else knocked it over and didn't tell you about it. The writer scratched the disk and repairing it will probably cost the same amount or more as buying a new hard drive. Give a better descriptionon this "noise".